这是我的问题:我有3个表,每个表中都有重叠的信息(特别是用户名)。除了用户名行在每个表中都没有被命名以外。由于用户名是特定于用户的,因此有必要根据用户名获取有关用户的所有其他信息。这就是我所拥有的。 (第一个函数返回查询,第二个函数返回数组中的信息(或者应该返回)。 函数get_user_by_id($ id){ 全局$ connection; $ query =“ SELECT * FROM ownerOrganization,所有者,queue_acl”; $ query。=“ WHERE owner.ownerId = ownerOrganization.ownerId”; $ query。=“ AND owner.ownerId = queue_acl.user_id”; $ query。=“” AND owner.ownerId ='{$ id}'“; $ result_set = mysql_query($ query); confirm_query($ result_set); 如果($ user = mysql_fetch_array($ result_set)){ 返回$ user; }其他{ 返回NULL; } } 函数get_user_id(){ 如果(isset($ _ GET ['ownerId'])){ 返回get_user_by_id($ _ GET ['ownerId']); } } 但是当我做类似的事情时,$ sel_user = get_user_id();在另一页上,它实际上并没有提取任何选定的用户信息...我认为这是因为我处理多个表的语法不正确。无论如何,任何输入将不胜感激。
2020-12-10 08:10:06
要使用JOINS,请以以下代码段为例: $ query =“ SELECT * FROM(ownerOrganization内部联接所有者ON owner.ownerId = ownerOrganization.ownerId)内部联接queue_acl ON owner.ownerId = queue_acl.user_id”; $ query。=“ WHERE owner.ownerId ='{$ id}'”; 问候 | 我正在输入或多或少@MTranchant写的内容。我建议重命名您的列,以简化查询编写并避免混淆。例如,您的ownerOrganization.ownerid可以命名为oo_ownerid,而表中的其他列可以遵循该命名约定。 另外,您是否使用已知存在的硬编码$ id对数据库运行查询? 最后,在发送到下一页的查询字符串中,是否出现看起来像“&ownerId =“的ownerId参数? | 你的答案 StackExchange.ifUsing(“ editor”,function(){ StackExchange.using(“ externalEditor”,function(){ StackExchange.using(“ snippets”,function(){ StackExchange.snippets.init(); }); }); },“代码段”); StackExchange.ready(function(){ var channelOptions = { 标签:“” .split(“”), id:“ 1” }; initTagRenderer(“”。split(“”),“” .split(“”),channelOptions); StackExchange.using(“ externalEditor”,function(){ //如果启用了摘要,则必须在摘要后触发编辑器 如果(StackExchange.settings.snippets.snippetsEnabled){ StackExchange.using(“ snippets”,function(){ createEditor(); }); } 其他{ createEditor(); } }); 函数createEditor(){ StackExchange.prepareEditor({ useStacksEditor:否, heartbeatType:“答案”, autoActivateHeartbeat:否, convertImagesToLinks:是, noModals:是的, showLowRepImageUploadWarning:是的, 声望:ToPostImages:10, bindNavPrevention:正确, 后缀:“”, imageUploader:{ brandingHtml:“采用\ u003ca href = \“ https://imgur.com/ \” \ u003e \ u003csvg class = \“ svg-icon \” width = \“ 50 \” height = \“ 18 \” viewBox = \“ 0 0 50 18 \” fill = \“ none \” xmlns = \“ http://www.w3.org/2000/svg \” \ u003e \ u003cpath d = \“ M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.74.3 4.313.6662 4.313.6662 43.1481 6.59048V11.9512C43.1481 13.2535 43.6264 13.8962 44.6595 13.8962C45.6924 13.8962 46.1709 13.2535 46.1709 11.9512V9.17788Z \“ / \ u003e \ u003cpath d = \” M32.492 10.1419C32.492 12.6954 34.1182 14.048437.0451 14.0484 41.5985 12.6954 41.5985 10.1419V6.59049C41.5985 5.28821 41.1394 4.66232 40.1061 4.66232C39.0732 4.66232 38.5948 5.28821 38.5948 6.59049V9.60062C38.5948 10.8521 38.2696 11.5455 37.0451 11.5455C35.8209 11.5455 35.4954 10.8 521 35.4954 9.60062V6.59049C35.4954 5.28821 35.0173 4.66232 34.0034 4.66232C32.9703 4.66232 32.492 5.28821 32.492 6.59049V10.1419Z \“ / \ u003e \ u003cpath fill-rule = \” evenodd \“ clip-rule = \” evenodd \“ d = \“ M25.6622 17.6335C27.8049 17.6335 29.3739 16.9402 30.2537 15.6379C30.8468 14.7755 30.9615 13.5579 30.9615 11.9512V6.59049C30.9615 5.28821 30.4833 4.66231 29.4502 4.66231C28.9913 4.66231 28.4555 4.94978 28.1109 5.50789C6.723 4.5608.787 .1369 4.56087 21.0134 6.57349 21.0134 9.27932C21.0134 11.9852 23.003 13.913 25.3754 13.913C26.5612 13.913 27.4607 13.4902 28.1109 12.6616C28.1109 12.7229 28.1161 12.7799 28.121 12.8346C28.1256 12.8854 28.1301 12.9342 28.1301 12.983C28.14.8349 15.2321 24.1352 14.9821 23.5661 14.7787C23.176 14.6393 22.8472 14.5218 22.5437 14.5218C21.7977 14.5218 21.2429 15.0123 21.2429 15.6887C21.2429 16.7375 22.9072 17.6335 25.6622 17.6335ZM24.1317 9.27932C24.1317 7.94324 24.9928 7.09766 6.69 27.2119 7.09766 28.0918 7.94324 28.0918 9.27932C28.0918 10.6321 27.2311 11.5116 26.1024 11.5116C24.9737 11.5116 24.1317 10.6491 24.1317 9.27932Z \“ / \ u003e \ u003cpath d = \” M16.8045 11.9512C16.8045 13.2535 17.2637 13.89629.31965 19.8079 13.2535 19.8079 11.9512V8.12928C19.8079 5.82936 18.4879 4.62866 16.4027 4.62866C15.1594 4.62866 14.279 4.98375 13.3609 5.88013C12.653 5.05154 11.6581 4.62866 10.3573 4.62866C9.34336 4.62866 8.57809 4.89931 7.9466 5.5079C7.510506203 4。 5.00066 5.28821 5.00066 6.59049V11.9512C5.00066 13.2535 5.47873 13.8962 6.51203 13.8962C7.54479 13.8962 8.0232 13.2535 8.0232 11.9512V8.90741C8.0232 7.58817 8.44431 6.91179 9.53458 6.91179C10.5104 6.91179 10.893 7.58817 10.893 8.9410811.93.8962 C13.4375 13.8962 13.9157 13.2535 13.9157 11.9512V8.90741C13.9157 7.58817 14.3365 6.91179 15.4269 6.91179C16.4027 6.91179 16.8045 7.58817 16.8045 8.94108V11.9512Z \“ / \ u003e \ u003cpath d = \“ M3.31675 6.59049C3.31675 5.28821 2.83866 4.66232 1.82471 4.66232C0.791758 4.66232 0.313354 5.28821 0.313354 6.59049V11.9512C0.313354 13.2535 0.791758 13.8962 1.82471 13.8962C2.85798 13.89623.31675 13.2535 3.31675 11.9512V6.59049Z \“ / \ u003e \ u003cpath d = \” M1.87209 0.400291C0.843612 0.400291 0 1.1159 0 1.98861C0 2.87869 0.822846 3.57676 1.87209 3.57676C2.90056 3.57676 3.7234 2.87869 3.7234 1.98861C3.7234 1.1159 1.87209 0.400291Z \“ fill = \”#1BB76E \“ / \ u003e \ u003c / svg \ u003e \ u003c / a \ u003e”, contentPolicyHtml:“根据\ u003ca href = \“ https://stackoverflow.com/help/licensing \” \ u003ecc by-sa \ u003c / a \ u003e \ u003ca href = \“ https://stackoverflow.com获得许可的用户贡献/ legal / content-policy \“ \ u003e(内容策略)\ u003c / a \ u003e”, allowUrls:是 }, onDemand:是的, dispatchSelector:“。discard-answer” ,立即ShowMarkdownHelp:true,enableTables:true,enableSnippets:true }); } }); 感谢您为Stack Overflow提供答案! 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